The Effect of Swirl Number and Oxidizer Composition on Combustion Characteristics of Non-Premixed Methane Flames

Abstract

This paper presents divergent phases of numerical investigations on non-premixed combustion flames. The study has been performed using the computational fluid dynamics software (CFD). In this study, the effect of swirl number and oxidizer composition on the combustion characteristics of air-methane combustion and comparison will be performed with respect to oxy-fuel combustion cases. The oxy-fuel combustion investigations were performed on three difference oxygen fractions, namely, 30, 40, and 50%, to investigate the effect of the oxidizer flexibility on combustion characteristics. Both investigations have been conducted under the non-premixed combustion model, and the flame is anchored over a swirl stabilizer. In this work, validation of a previous experimental work was successfully achieved and a grid independency study was performed. The axial and radial temperature distribution are analyzed and reported. The velocity stream lines and emission concentrations are also reported. Furthermore, the effect o...